粉末冶金原位制备(Ti,W)C/Fe耐磨覆层材料的研究  

Study on(Ti,W)C/Fe Wear Resistance Cladding Material Fabricatied by In-situ Powder Metallurgy

作　　者：郭伦[1] 王一三[1] 王静[1] 张勇[1] 

机构地区：[1]四川大学制造科学与工程学院,四川成都610065

出　　处：《热加工工艺》2007年第15期50-53,共4页Hot Working Technology

基　　金：科技部中小企业技术创新基金资助项目(01C2622511110095)

摘　　要：采用粉末冶金真空烧结技术,在45钢表面原位反应制备了厚度为3～4 mm的(Ti,W)C∕Fe表面覆层材料,覆层中硬质相质量分数为35%。用扫描电镜和X射线衍射分析了覆层材料的微观组织结构及相组成,结果表明,覆层材料硬质相主要由(Ti,W)C、Fe3W3C和少量TiC颗粒组成,硬质相(Ti,W)C呈球形,在基体中均匀分布。能谱分析发现,覆层中合金元素向基体45钢中扩散均匀,实现了良好的冶金结合。磨损试验结果显示,表面覆层材料的耐磨性是高铬铸铁的5～6倍。The （Ti,W）C/Fe cladding material on 45 steel surface was produced by in-situ synthesis and powder metallurgy route, the thickness of the cladding was 3-4 mm and the mass percent of the hard phase reached 35%. The microstructure of the cladding was analyzed by scanning electron microscope and X-ray diffraction. The results indicate that the hard phase of surface cladding is mainly （Ti,W）C, Fe3W3C and TiC; the round （Ti,W）C particles uniformly distribute in α-Fe. Analysis of the energy spectrum shows that the alloying elements uniformly diffuse in 45steel base, and the interface bonds very well.The abrasion experiment shows that the wear-resistance of the cladding material is 4- 5 times greater than that of high-chromium cast-iron.

关 键 词：原位内生 表面覆层 颗粒增强 (TI W)C 耐磨性 

分 类 号：TG174.44[金属学及工艺—金属表面处理]